Tube Strength charactoristics

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To determine the load-bearing strength difference between a hollow tube and a solid tube with a uniform cross-section, one should calculate the sectional modulus for both designs. The stress induced in each tube can be assessed using the formula σ = M/Z, where σ is the stress, M is the applied moment, and Z is the section modulus. While compression strength may be similar for both types, the load-bearing capacity along the length of the tube is expected to differ significantly. The weakest point is likely where the cross-section is smallest, particularly in the hollow tube, and stress concentrations may occur at sharp corners. Understanding these factors is crucial for effective design in applications like space frame chassis for vehicles.
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How would i work out the load baring strength difference between a hollow tube and a tube, with a x section throughout the length?(as per thread bellow)

http://i323.photobucket.com/albums/nn463/pharllap/endview.jpg

I love designing things and in this case I'm asking in respect to space frame chassis for vehicle.

Strength is broad question and thinking compression strength form the end be similar to hollow, however load baring strength along the length I'm thinking should be a substantial difference..
Any help greatly appreciated

Regards Phil(Perth, OZ)
 
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by calculating the sectional modulus for both cross sections
σ = M/Z
σ = stress induced
M = Moment applied
Z = section modulus
 
pharllap said:
How would i work out the load baring strength difference between a hollow tube and a tube, with a x section throughout the length?(as per thread bellow)

http://i323.photobucket.com/albums/nn463/pharllap/endview.jpg

I love designing things and in this case I'm asking in respect to space frame chassis for vehicle.

Strength is broad question and thinking compression strength form the end be similar to hollow, however load baring strength along the length I'm thinking should be a substantial difference..
Any help greatly appreciated

Regards Phil(Perth, OZ)

what you want to ask is how the stress varies along the axis of the vessel. I think the weakest part will occur where you have the smallest X-section, like in the hollow part. However, stress concentration at sharp corners in the transverse cross-section may also exist.
 

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